WO2015174038A1

WO2015174038A1 - Blower device

Info

Publication number: WO2015174038A1
Application number: PCT/JP2015/002274
Authority: WO
Inventors: 本村　博久
Original assignee: 株式会社デンソー
Priority date: 2014-05-12
Filing date: 2015-04-28
Publication date: 2015-11-19
Also published as: JP6354309B2; CN106164498A; US20170058903A1; JP2015214939A; CN106164498B; US10288077B2; DE112015002245T5

Abstract

A blower device that comprises: a ring-shaped cover (3) that covers a motor upper part (30a) and that is attached to a motor holder (1) that surrounds an opening (2); and a blower fan (5) that has a rotational center part that is joined to a rotating shaft and that has a lower end part that approaches the motor holder (1). The ring-shaped cover (3) comprises a sleeve part (3s) that covers the motor upper part (30a), a flange part (3f) that extends from a lower end of the sleeve part (3s) and that covers the surface of the motor holder (1), and an annular skirt part (3w) that is formed at the peripheral edge of the flange part (3f). The annular skirt part (3w) is pressed into an annular groove (1m) of the motor holder (1).

Description

Blower device

Cross-reference of related applications

This application is based on Japanese Application No. 2014-98970 filed on May 12, 2014, the contents of which are incorporated herein by reference.

This disclosure relates to a blower device.

In the blower device described in Patent Document 1, a sirocco fan constituting a blower fan is housed in a blower case. The blower motor shaft is coupled to the rotation center of the fan. The blower motor is surrounded by a motor holder. The motor holder is connected to the blower case. The blower case is attached to the vehicle body.

The blower fan selectively takes in air from inside and outside the vehicle through a movable damper, and sends the air flow from the blower case to the air conditioning duct of the vehicle air conditioner by the rotation of the blower fan. Air-conditioned air whose temperature is adjusted by an evaporator or a heater arranged in the air-conditioning duct is blown out into the passenger compartment.

Japanese Patent Laid-Open No. 11-82384

∙ Air taken from outside the vehicle via a movable damper may contain rainwater. The water is diffused by the blower fan to form a mist and scatters around the blower motor from the motor holder. The blower motor has at least a rotating shaft protruding from the motor housing. Further, a wiring portion for supplying power to the blower motor passes through the motor housing. The wiring part is provided with a rubber grommet for waterproofing, but water easily enters.

Also, water can easily enter from the gap between the rotating shaft and the motor housing. The intrusion of water may cause rusting in the bearing and decrease the insulation performance of the blower motor.

Also, in order to improve the heat dissipation performance of the blower motor, an open type (non-hermetic type) blower motor in which parts such as an armature inside the motor are exposed to the outside is often used. In addition, the rotational speed of the blower motor is increased, and so-called high power motors tend to be used, and further improvement of waterproof measures for the blower device is desired.

This disclosure is intended to provide a blower device in which water dropped from a blower fan is unlikely to enter the blower motor through the surface of the motor holder.

The contents of the patent documents listed as the prior art can be introduced or incorporated by reference as an explanation of the technical elements described in this specification.

In one form of the present disclosure, the blower device includes a motor holder, a blower motor, a ring cover, and a blower fan. The motor holder has an opening at the center and an annular groove around the opening. The blower motor is attached to the motor holder so that the motor upper part and the rotating shaft protrude from the opening. The ring-shaped cover is attached to the motor holder so as to cover the periphery of the blower motor around the opening. The blower fan has a rotation center coupled to a rotation shaft above the blower motor.

The ring-shaped cover includes a sleeve part, a flange part, and a skirt part. The sleeve portion covers the periphery of the blower motor in a ring shape. The flange portion extends annularly continuously from the lower end of the sleeve portion and partially covers the surface of the motor holder. The skirt portion protrudes annularly from the flange portion and is inserted into the annular groove portion.

According to this, the water that has entered the blower device penetrates from between the surface of the motor holder and the ring-shaped cover and tries to go to the blower motor, but the annular skirt portion inserted into the annular groove portion. The water intrusion path is bent into a U shape. The labyrinth structure is formed by inserting the annular skirt portion into the annular groove portion, and the labyrinth structure is interposed in the water intrusion path, thereby preventing intrusion into the blower motor. Further, the water that has reached the upper part of the ring-shaped cover needs to climb over the sleeve portion provided in the wall shape, and the intrusion of water reaching the blower motor is suppressed by this sleeve portion.

It is a partial cross section figure which shows the coupling | bond part of the blower motor and blower fan of the blower apparatus in one Embodiment. It is a partial cross section figure of the ring-shaped cover used for the said one Embodiment. It is a perspective view of the ring-shaped cover used for the one embodiment. It is a partially expanded view which shows the shape of the ring-shaped protrusion part in FIG. It is a perspective view of the motor holder which shows the state in which the annular groove part is formed around the hole of the motor holder which accommodates a blower motor. It is a perspective view which shows the state which accommodated the blower motor in the opening part of the motor holder in the said one embodiment, and covered the ring-shaped cover. It is a perspective view which shows the motor upper part of the blower apparatus of a comparative example, a ring-shaped cover, and a motor holder. It is a partial longitudinal cross-sectional view which shows the blower motor and blower fan of the blower apparatus of a comparative example.

(One embodiment)
Before describing one embodiment, a non-known blower device in a development process as a comparative example of one embodiment will be described.

7 and 8 show a blower device of a comparative example. FIG. 8 illustrates the water ingress path in the blower device that rotates the blower fan 5 composed of a multiblade fan above the blower motor 30.

As shown in FIG. 7, the blower motor 30 is inserted into the opening 2 of the hole 1h that houses the blower motor 30 of the motor holder 1 having a disk-like upper portion. The surface of the motor holder 1 around the motor upper portion 30a is covered with a ring-shaped cover 3 separate from the motor holder 1 from above so that water does not easily enter the motor upper portion 30a.

The ring-shaped cover 3 is a ring-shaped band surrounding the blower motor 30 as shown in FIG. 8, and the upper end of the ring-shaped cover 3 is folded back to repel water that has climbed the ring-shaped band. By covering this ring-shaped cover 3 around the blower motor 30, the gap between the outer periphery of the blower motor 30 and the inner periphery of the hole 1h of the motor holder 1 can be hidden, and water can be prevented from entering the gap. .

However, even in such a case, in some cases, inundation into the blower motor 30 could not be avoided. There were two water ingress routes. In FIG. 8, the first path R <b> 1 is a path through which the gap between the motor holder 1 and the ring-shaped cover 3 is immersed from below.

2nd path | route R2 is a path | route which climbs the outer surface of the motor holder 1 and the ring-shaped cover 3, and penetrates into the motor upper part 30a. In particular, the recent blower motor 30 is often used as an open type in which the blower motor 30 is not sealed with a cylindrical motor housing in order to improve heat dissipation and reduce weight. In this case, water is more likely to enter the blower motor 30.

The central portion of the blower fan 5 has an umbrella-shaped slope portion 52 in which the blower motor 30 is provided. Therefore, in particular, when water from the outside is applied to the blower fan 5 of FIG. 8, the water flowing down the slope portion 52 becomes mist-like due to the high speed rotation of the blower fan 5, and the first path R1 and the second path Water easily enters the blower motor 30 via R2.

Note that a large number of blades 5 b are connected around the lower end of the slope portion 52. The upper ends of the blades 5b are connected by a ring portion 53, and the multiblade fan has a squirrel cage shape.

An embodiment will be described below with reference to FIGS. 1 to 6 for a comparative example. In an embodiment of the present disclosure, a blower device is provided in which water does not easily enter the blower motor 30 from the first path R1 and the second path R2.

As shown in FIG. 5, the blower device has a motor holder 1, and the motor holder 1 has a disk shape at the top and a hole 1 h at the center, and is attached to the blower casing 5 k with bolts or the like. Three recesses 1h1, 1h2, 1h3 are formed on the inner wall of the hole 1h. A floating rubber (not shown) is inserted into the recesses 1h1 to 1h3, and the housing of the blower motor 30 is inserted into the hole 1h through the floating rubber through the opening 2 and supported by the motor holder 1. The floating rubber prevents the vibration of the blower motor 30 from entering the vehicle interior via the motor holder 1 and the blower casing 5k.

An annular groove 1m is formed around the three recesses 1h1 to 1h3 for storing the floating rubber. The blower motor 30 is inserted into the hole 1h from the opening 2 as in FIG. As shown in FIG. 6, the rotation shaft 4 of the blower motor 30 protrudes upward from the center of the blower motor 30. From the opening 2, the motor upper part 30 a protrudes together with the rotating shaft 4. The blower motor 30 is a DC commutator motor having a permanent magnet field.

6 is provided with a ring-shaped cover 3 that is attached to the motor holder 1 around the opening 2 in FIG. 6 and covers the periphery of the motor upper portion 30a. The motor holder 1 has an annular groove 1m. An annular skirt portion 3w that exists in a wall shape on the outer peripheral portion of the ring-shaped cover 3 is lightly press-fitted into the annular groove portion 1m. Pressing lightly means pressing with a relatively weak force. As a result, the ring-shaped cover 3 is attached to the surface of the motor holder 1, but the ring-shaped cover 3 and the motor holder 1 may be separately coupled by a claw or a pin.

The shape of the annular groove 1m is configured according to the outer peripheral shape of the ring-shaped cover 3, and is a non-circular shape (generally triangular) along the protruding portions 3t of the three ring-shaped covers 3. The reason for being non-circular is that the annular groove 1m extends to avoid the recesses 1h1 to 1h3 into which the floating rubber is inserted. Thus, by making it not a circle but a circle, the peripheral length of the annular groove 1m can be made smaller, and as a result, the size of the ring-shaped cover 3 can be made smaller. Further, as shown in FIG. 3, the ring-shaped cover 3 has almost no flange portion 3f, and a portion where the sleeve portion 3s rises adjacent to the annular groove portion 1m is formed. The flange portion 3f itself is not essential for preventing water from entering the blower motor 30.

As shown in FIG. 1, the blower fan 5 has the blower motor 30 coupled to the blower motor 30 at the center of rotation and the lower end of the blower fan 5 faces the motor holder 1. As shown in FIG. 2, the cross-sectional shape of the ring-shaped cover 3 includes a sleeve portion 3s in which a plurality of concave and convex portions 6 are formed around the motor upper portion 30a.

The concavo-convex portion 6 is formed of at least one ring-shaped protrusion 6h1, 6h2. A plurality of protrusions 6h1 and 6h2 are provided at predetermined intervals in the vertical direction.

The ring-shaped cover 3 has a flange portion 3f that partially covers the surface of the motor holder 1 continuously from the lower end of the sleeve portion 3s. An annular skirt portion 3w is formed to hang downward from the flange portion 3f. The annular skirt 3w is lightly press-fitted into the annular groove 1m of the motor holder 1.

In FIG. 1, an annular skirt portion 3w is formed to hang downward from the periphery of the flange portion 3f. However, the annular skirt portion 3w is branched from the inside of the periphery of the flange portion 3f. 1 It may be formed depending on the lower side.

The flange portion 3f covers the surface of the motor holder 1 and is gently inclined so that water flows from the center side of the motor holder 1 toward the outer peripheral side. Note that this inclination is not essential.

As shown in FIG. 1, the cross-sectional shape of the sleeve portion 3 s is a wedge shape whose thickness decreases toward the lower side, and the inner peripheral portion 3 s 1 of the sleeve portion 3 s is in close contact with the outer peripheral portion 301 of the blower motor 30. Further, the outer peripheral portion 301 of the blower motor 30 with which the inner peripheral portion 3s1 of the sleeve portion 3s is in contact is inclined with respect to the vertical direction in FIG. 1, that is, the direction of the central axis 30j (see FIG. 8) of the blower motor 30.

Further, the inner peripheral portion 3s1 of the sleeve portion 3s is also inclined with respect to the direction of the central axis 30j of the blower motor 30. On the other hand, the annular groove 1m and the annular skirt 3w lightly press-fitted into the annular groove 1m are parallel to the direction of the central axis 30j. Therefore, when the annular skirt portion 3w is inserted into the annular groove portion 1m and the ring-shaped cover 3 is attached to the upper portion of the motor holder 1, the inner peripheral portion 3s1 of the sleeve portion 3s becomes the outer peripheral portion 301 of the blower motor 30. On the other hand, a pressure force radially inward is applied. As a result, the inner peripheral portion 3 s 1 of the sleeve portion 3 s is pressed against the outer peripheral portion 301 of the blower motor 30.

By this pressure contact, there is no gap between the inner peripheral portion 3s1 of the sleeve portion 3s and the outer peripheral portion 301 of the blower motor 30, and water does not enter.

The motor holder 1 and the ring-shaped cover 3 are resin molded products. The sleeve portion 3s, the concavo-convex portion 6, the flange portion 3f, and the annular skirt portion 3w, which are a part of the ring-shaped cover 3, are integrally molded products that are continuously molded from the same resin material.

As shown in FIGS. 2 to 3, the concavo-convex portion 6 includes a plurality of ring-shaped first protrusions 6h1, second protrusions 6h2, and depressions 6d1 provided below the protrusions 6h1 and 6h2. , 6d2 are formed. The height H1 of the lowermost recess 6d2 is set to be larger than the height of the recess 6d1 thereabove. These shapes are the same in FIGS. 3, 4, and 5.

In addition, in this one Embodiment, although the some protrusion part 6h1, 6h2 was provided, the uneven | corrugated | grooved part 6 may be comprised by the single protrusion part 6h1 or 6h2. The radial protrusion length of the lowermost second protrusion 6h2 is longer than the radial protrusion length of the upper first protrusion 6h1. As shown in FIGS. 2 and 3, a cylindrical sleeve portion 3 s is surrounded in a ring shape and double, and a plurality of projecting portions 6 h 1 and 6 h 2 extend over the entire circumference.

According to the above embodiment, the blower motor 30 is inserted into the opening 2 of the hole 1 h of the motor holder 1. There are two paths as described above for the water 10 to enter the motor upper part 30 a in the opening 2 from the surface of the motor holder 1.

Since the motor holder 1 surrounds the periphery of the blower motor 30, the water 10 enters the second passage from the outer periphery of the motor holder 1 over the wall of the sleeve portion 3 s of the ring-shaped cover 3 and into the opening 2. A route R2 is provided as in FIG.

The sleeve portion 3s of the ring-shaped cover 3 that is attached around the opening 2 and covers the blower motor 30 can constitute a wall that stands against the first path. And since the uneven part 6 is formed in the ring-shaped cover 3 around the blower motor 30, the uneven part 6 which has the protrusion parts 6h1 and 6h2 rebounds the water which is going to climb a wall. The water 10 bounced off as indicated by the arrow Y1 in FIG. 1 flows down from the lower end of the sleeve portion 3s to the flange portion 3f that covers the surface of the motor holder 1 or the surface of the motor holder 1.

The ring-shaped cover 3 is placed around the blower motor 30 and covers the gap between the blower motor 30 and the motor holder 1 from the upper side (blower fan side). The ring-shaped cover 3 includes an annular skirt portion 3w. The annular skirt portion 3w is formed continuously from the lower end of the sleeve portion 3s to the periphery of the flange portion 3f that covers the surface of the motor holder 1, and is lightly press-fitted into the annular groove portion 1m of the motor holder 1.

Therefore, a labyrinth structure is formed by the annular groove portion 1m of the motor holder 1 and the annular skirt portion 3w lightly press-fitted into the annular groove portion 1m.

The water of the 1st path | route R1 similar to FIG. 8 which permeates from the clearance gap between the lower part of FIG. 1 of the flange part 3f and the motor holder 1 can be blocked | prevented by the said labyrinth structure.

The motor holder 1 is coupled to a blower casing 5k (FIG. 6) surrounding the blower fan 5 with bolts or the like as is well known. The blower fan 5 is composed of a multiblade fan having a large number of blades 5b on the outer periphery. As shown in FIG. 8, the blower fan 5 has a fan central portion 51 that spreads in an umbrella shape from the top to the ground in FIG. In FIG. 1, both the rotating shaft 4 and the fan central portion 51 are not shown because they are located on the left side.

As in FIG. 8, this embodiment has a fan base 510 that forms a part of the lower surface of the blower fan 5 and to which the rotating shaft 4 is coupled, as in FIG. 8. The position of the annular skirt portion 3w is set so that the water flowing down from the fan base portion 510 to the slope portion 52 which is a part of the fan base portion 510 falls to the outer peripheral side of the annular skirt portion 3w. That is, the radial length from the central axis 30j of the blower motor 30 to the outer peripheral edge 521 which is the lowermost end of the slope portion 52 is longer than the radial length from the central axis 30j of the blower motor 30 to the annular skirt portion 3w. The dimension is set to. The flange portion 3f has an inclined portion 31 so as to guide the falling water to the outer peripheral side of the annular skirt portion 3w. In addition, this inclination part is not an essential structural requirement.

As shown in FIGS. 1 and 5, protrusions 6h1 and 6h2 are provided on the inside of the slope part 52 on the outer surface of the fan base 510 at a predetermined interval so as to protrude toward the slope part 52. The portion 6h1 protrudes the longest from the sleeve portion 6s.

Further, the concavo-convex portion 6 is formed of a plurality of ring-shaped protrusions 6h1 and 6h2 and a plurality of recesses 6d1 and 6d2 provided below the protrusions 6h1 and 6h2. The water climbing up the sleeve portion 3s provided with the protrusions 6h1 and 6h2 and the recesses 6d1 and 6d2 needs to get over the plurality of protrusions 6h1 and 6h2. Since the height H1 of the lowermost recess 6d2 is set to be the largest, the water that has reached the sleeve 3s is rebounded to the recess 6d2 and the second protrusion 6h2 in a large curve as indicated by the arrow Y1. . Thereby, the momentum of the water which tries to get over the 1st protrusion part 6h1 of an upper stage is attenuate | damped greatly.

Water flowing down the slope portion 52 that is a part of the fan base portion 510 is prevented from entering the blower motor 30 by the labyrinth structure constituted by the annular skirt portion 3w and the annular groove portion 1m and the uneven portion 6. .

As shown in FIG. 1, the blower fan 5 has a fan base 510 that spreads in an umbrella shape from the sky toward the ground at the center of the blower fan 5. The fan base 510 has a fan center 51 and a slope 52 that are not shown. A plurality of projecting portions 6h1 and 6h2 are provided inside the slope portion 52 of the fan base portion 510 with a predetermined interval (3 mm or more). Therefore, even if the projecting length of the lowest second projecting part 6h2 is the largest, the slope part 52 spreads in an umbrella shape, so the first projecting part 6h1 does not contact the inside of the slope part 52, The rotation of the blower fan 5 is not hindered.

Thus, since the slope portion 52 exists, the projecting length of the second projecting portion 6h2 at the lowest stage can be configured to be the largest. Thereby, the water with momentum can be rebounded by drawing a large arc as indicated by the arrow Y1 in FIGS. 1 and 4 by the second protrusion 6h2 and the recess 6d2 having a long protrusion length.

According to the above embodiment, the water dropped from the blower fan 5 falls on the surface of the motor holder 1. Further, water permeates from between the surface of the motor holder 1 and the ring-shaped cover 3 and tries to go to the blower motor 30, but the water intrusion route is formed by the annular skirt portion 3 w inserted into the annular groove portion 1 m. Is bent into a U-shape. The labyrinth structure is formed by inserting the annular skirt portion 3w into the annular groove portion 1m, and the labyrinth structure is interposed in the water intrusion path, thereby preventing the blower motor 30 from entering. Further, the water that has reached the upper part of the ring-shaped cover 3 needs to get over the sleeve portion 3s provided in a wall shape, and the intrusion of water reaching the blower motor 30 is suppressed by the sleeve portion 3s.

Since the water climbing up the sleeve portion 3s is rebounded by the protruding portion 6h1 or 6h2, the intrusion of water reaching the blower motor is suppressed.

Since the water does not enter the blower motor 30 unless the first projecting portion 6h1 is further climbed over the lower second projecting portion 6h2, the ingress of water can be further suppressed.

The sleeve portion 3s, the first projecting portion 6h1, and the second projecting portion 6h2 are covered with an umbrella-shaped slope portion 52. Therefore, the water falling from the blower fan 5 is not directly received by the sleeve portion 3s, the first projecting portion 6h1, and the second projecting portion 6h2, and the water hardly enters the blower motor 30.

When the first protrusion 6h1 and the second protrusion 6h2 come into contact with the lower end of the slope portion 52 of the blower fan 5, the rotation of the blower fan 5 is inhibited. Therefore, the first protrusion 6h1 and the second protrusion 6h2 It is necessary not to contact the lower end of the slope portion 52 of the fan 5. In this regard, since the slope portion 52 spreads in an umbrella shape, the protruding length in the radial direction of the second protruding portion 6h2 can be easily set longer than the protruding length in the radial direction of the first protruding portion 6h1. Thereby, the water that has entered through the second protrusion 6h2 can be rebounded more reliably.

When the ring-shaped cover 3 is assembled to the motor holder 1 from above and the annular skirt portion 3w is inserted into the annular groove portion 1m, the inner peripheral portion 3s1 of the sleeve portion 3s is radially applied to the outer peripheral portion 301 of the blower motor 30. Pressed. For this reason, the clearance gap between the sleeve part 3s and the blower motor 30 is lose | eliminated, and the permeation of the water through a clearance gap can be suppressed.

(Other embodiments)
The present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present disclosure. The structure of the said embodiment is an illustration to the last, Comprising: The range of this indication is not limited to the range of these description. The scope of the present disclosure is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

The blower fan may be an axial fan other than the multi-blade fan. The blower motor may be a brushless motor. In particular, there is a need for water immersion suppression in the case of using a high-speed rotation type blower motor having a rotation speed of 5000 rpm or more, and application of the present disclosure is desirable, but it may be used for a motor having a rotation speed of 5000 rpm or less. Further, the present disclosure can be applied to a case where a hermetic motor in which an armature is covered with a cylindrical motor housing is used. By applying the present disclosure, even in such a sealed motor, it is possible to suppress rusting and the like due to water entering a bearing portion inside the blower motor from a portion where the rotating shaft protrudes from the motor housing.

Furthermore, although the embodiment has shown an example in which the central axis 30j of the blower motor is vertical, any configuration may be used as long as water is applied to the blower fan from above in the top direction. In other words, the present disclosure can be applied even if the central axis 30j of the blower motor is not vertical but is inclined about 45 degrees.

Claims

A motor holder (1) having an opening (2) in the center and an annular groove (1m) around the opening (2);
A blower motor (30) attached to the motor holder (1) so that the motor upper part (30a) and the rotating shaft (4) protrude from the opening (2);
A ring-shaped cover (3) attached to the motor holder (1) so as to cover the periphery of the blower motor (30) around the opening (2);
A blower fan (5) having a rotation center portion coupled to the rotation shaft (4) above the blower motor;
The ring-shaped cover (3)
A sleeve portion (3s) covering the periphery of the blower motor (30) in a ring shape;
A flange portion (3f) continuously extending from the lower end of the sleeve portion (3s) and partially covering the surface of the motor holder (1);
A blower device comprising: a skirt portion (3w) protruding annularly from the flange portion (3f) and inserted into the annular groove portion (1m).
The blower device according to claim 1, wherein projecting portions (6h1, 6h2) projecting in an annular shape are provided around the sleeve portion (3s).
The blower device according to claim 2, wherein a plurality of the protrusions (6h1, 6h2) are provided at predetermined intervals in the vertical direction.
Of the plurality of protrusions (6h1, 6h2), the lowermost protrusion (6h2) has a longer protrusion length than the protrusion (6h1) above the sleeve (3s). The blower device according to claim 3.
The blower fan (5)
A fan base (51) that forms part of the lower surface of the blower fan and is coupled to the rotating shaft;
Having an umbrella-shaped slope portion (52) that is inclined so as to be positioned downward from the fan base portion (51) toward the outer periphery;
The blower according to any one of claims 1 to 4, wherein the sleeve portion (3s) and the skirt portion (3w) are located on an inner side than an outer peripheral edge (521) of the slope portion (52). apparatus.
The sleeve portion (3s) surrounds the motor upper portion (30a) in a cylindrical shape,
The cross-sectional shape of the sleeve portion (3s) is a wedge shape whose thickness decreases toward the lower side,
An inner peripheral part (3s1) of the sleeve part (3s) is inclined with respect to the rotation shaft (4),
The blower device according to any one of claims 1 to 5, wherein an outer peripheral part (301) of the upper part of the motor, which is in close contact with the inner peripheral part (3s1), is also inclined with respect to the rotating shaft (4).